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Why Elevators Stop at Exact Floor Levels
电梯为何能精准停靠在指定楼层
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Elevators stop smoothly and exactly level with each floor.电梯平稳停靠，精准对齐每层楼面。
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Magnetic sensors on the elevator shaft detect position in real time.电梯井道内的磁性传感器实时检测轿厢位置。
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A computer compares current height with target floor height.计算机将当前高度与目标楼层高度进行比对。
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If slightly too high or low, the motor adjusts speed before stopping.若稍高或稍低，电机将在停靠前微调速度。
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Rubber bumpers and leveling switches fine-tune the final position.橡胶缓冲器和平层开关进一步精调最终位置。
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This prevents tripping and lets wheelchairs roll on and off safely.这可防止绊倒，并确保轮椅安全进出。
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Brakes hold the car still once alignment is perfect.对齐到位后，制动器使轿厢保持静止。
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All this happens silently and automatically every time.每次运行，这一切都静音且自动完成。